Resumen de The Relative Motion When Accelerating the Container of an Object Submerged in a Fluid
Ah Reum Yang, Jung Bog Kim, Hee Ra Kim, Yu Chen
When asked about the acceleration of an object thrown upward at the moment it reaches its apex, many students answer zero. Situations that can cause conflict with misconceptions shared by many students have been very beneficial for physics education. If one end of a string is fixed to the inside bottom of a bottle containing water and a Styrofoam ball is suspended, submerged in the water, at the other end, and the water bottle is pushed by hand, thereby accelerating it to the left, in which direction will the submerged Styrofoam ball move? Most students might say that the force of inertia causes it to move to the right (in the direction opposite the bottle’s acceleration) in the moving frame. Most students give the wrong answer because they remember inertia only. We implemented this experiment, and we observed the Styrofoam ball moving to the left relative to the water. As teachers, we want to think about what we are missing and how to teach this phenomenon.
